Patterning of a wide variety of materials by template-directed adsorption on alkanethiol-patterned gold surfaces

COLL 181

Amol Chandekar, Amol_Chandekar@student.uml.edu1, Ji-Sun Im1, Sandip K. Sengupta2, and JE. Whitten, James_Whitten@uml.edu3. (1) Department of Chemistry, University of Massachusetts Lowell, 265 South Riverside St., Lowell, MA 01854, (2) Department of Chemistry and Center for High-Rate Nanomanufacturing, University of Massachusetts Lowell, 265 South Riverside Street, Lowell, MA 01854, (3) Department of Chemistry and Center for Advanced Materials, University of Massachusetts, 265 South Riverside Street, Olney Hall - Room 520, Lowell, MA 01854
Toward the goal of forming micro- and nano-patterns on surfaces, we have developed an operationally simple and inexpensive templating methodology that involves using patterns of functionalized alkanethiols to tailor the wetting properties of a surface. Patterned arrays of two different functionalized thiols on the same gold substrate have been prepared by patterning a hydrophilic alkanethiol using either microcontact printing or dip-pen nanolithography, followed by backfilling the surface with a hydrophobic alkanethiol. This patterned array has been used as a template for patterning block copolymers comprised of mostly hydrophilic blocks. It is demonstrated that regions of the surface patterned with hydrophilic alkanethiol preferentially adsorb the copolymer, while regions patterned with hydrophobic alkanethiol preferentially dewet it. This methodology has also been used to pattern a wide variety of materials including proteins, amino acids, conjugated oligomers and alkanethiol functionalized gold nanoparticles.
 

Fundamental Research in Colloid and Surface Chemistry
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster

Division of Colloid & Surface Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007